灌叢黃耆
| 灌叢黃耆 |
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中文學名:灌叢黃耆 拉丁學名:Astragalus dumetorum Hand.-Mazz. 界:植物界 門:被子植物門 綱:雙子葉植物綱 目:豆目 科:豆科 屬:黃耆屬 種:灌叢黃耆 分布區域:四川、 雲南等地 |
灌叢黃耆（guàn cóng huáng qí，學名：Astragalus dumetorum）為豆科黃芪屬的植物，是中國的特有植物。多年生草本，根粗壯。分布在中國大陸的四川、雲南等地，生長於海拔3,900米的地區，常生長在山坡草地，目前尚未由人工引種栽培。 [1]
目錄
灌叢黃耆形態特徵
多年生草本。根粗壯。 莖多數，上升，高45-90厘米，有條棱，具分枝，無毛。
奇數羽狀複葉，具25-33片小葉，長10-17厘米，具短柄；托葉離生，三角狀卵形，長1-2厘米，先端尖，具緣毛；小葉橢圓形或卵狀長圓形，長5-25毫米，寬2-12毫米，先端鈍圓或具短尖頭，基部寬楔形或近圓形，上面近無毛，下面疏被白色長柔毛。
總狀花序生多數花，較密集；總花梗生上部葉腋，較葉稍短；苞片膜質，披針形，長5-7毫米；花梗長1-3毫米，被柔毛；小苞片缺；花萼鍾狀，長4-6毫米，外面疏被褐色柔毛，萼齒三角狀披針形，與萼筒近等長或稍短；
花冠淡黃色，旗瓣倒卵形，長8-10毫米，先端微凹，基部漸狹成瓣柄，翼瓣較旗瓣稍短，瓣片橢圓形，基部具短耳，瓣柄與瓣片近等長，龍骨瓣與翼瓣近等長；子房無毛，具短柄。
莢果半卵形，長8-10毫米，寬3-5毫米，兩端尖，果頸長約2毫米，近假2室。
種子少數，腎形，栗褐色，直徑約1毫米。 花期7-8月。[2]
Astragalus dumetorum Hand. -Mazz. Symb. Sin. 7: 555. 1933; Pet. -Stib. in Acta Hort. Gothob. 12: 45. 1937-1938; 中國主要植物圖說·豆科380. 1955.
Plants 30-90 cm tall, very sparsely to sometimes loosely covered with subappressed hairs 0.3-0.5 mm. Stems several, 1.5-2 mm thick, ascending, simple or with short non-flowering lateral branches, glabrous or to loosely hairy. Leaves 7-17 cm; stipules 8-15 mm, glabrous or ciliate; petiole short, like rachis very sparsely white and black hairy; leaflets in 12-16 pairs, narrowly elliptic, 5-18 × 3-8 mm, abaxially hairy at margins and at midvein or all over, adaxially glabrous, apex rounded to truncate. Racemes shortly cylindric, 3-6 cm, densely many flowered, in fruit elongated up to 15 cm; peduncle 6-11 cm, sparsely white and black hairy or subglabrous; bracts 5-8 mm, glabrous. Bracteoles sometimes present, 0.4-1 mm, like bracts soon falling. Calyx ca. 6 mm, at base densely, otherwise sparsely, or all over rather densely, white or black hairy; teeth mostly unequal, 1.5-3 mm. Petals yellow; standard widely obo-vate, 10-11 × ca. 7 mm, emarginate; wings and keel 9-10 mm. Stigma glabrous. Legumes with a stipe 6-7 mm, obliquely ellipsoid, 11-17 mm, 7-8 mm high and 3-4 mm wide, keeled ventrally, slightly grooved dorsally, with a curved beak 2-4 mm, 2-locular; valves thin, brown to blackish, glabrous.
● 3900-4400 m. Sichuan, Xizang, Yunnan.
灌叢黃耆生長環境
生長於海拔3900米的山坡草地。[3]